Journal articles: 'Plate evaporator'

1

Gray, R. M. "The plate evaporator." Journal of Applied Chemistry and Biotechnology 21, no. 12 (April 25, 2007): 359–62. http://dx.doi.org/10.1002/jctb.5020211205.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Zhou, Shu Zhang, Rui Kong, Min Qiang Pan, Qiao Xia Yuan, and Ting Bo Hou. "Effects of Microstructure Types on the Evaporation Efficiency of Electrically Heated Micro Evaporator." Advanced Materials Research 655-657 (January 2013): 1123–26. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.1123.

Full text

Abstract:

In this work, a laminated microstructure-plate electrically heated micro evaporator was proposed. The effects of microstructure types on the evaporation efficiency of electrically heated micro evaporator under different input voltage values and flow rates of water were investigated. It was indicated that the triangular microstructure plate presented the best evaporation efficiency regardless of the change of input voltage and feed flow rate. The nonuniform-distributed microchannel plate presented better evaporation performance than that of uniform-distributed microchannel plate, while the triangular microstructure plate presented higher evaporative performance than that of rectangular microstructure plate.

APA, Harvard, Vancouver, ISO, and other styles

3

Zavargo, Zoltan, Aleksandar Jokic, Bojana Prodanic, Jasna Grbic, and Rada Jeftic-Mucibabic. "Performance of falling film plate evaporators in reconstructed multiple-effect evaporation station in sugar factory." Thermal Science 10, no. 4 (2006): 55–61. http://dx.doi.org/10.2298/tsci0604055z.

Full text

Abstract:

General trend of free trade in regional level as well as in the direction of European Union has motivated sugar factories located in Serbia to invest into technologies that are more efficient in order to make their products more competitive at the markets in Europe. The aim of this work was to evaluate effects of falling film plate evaporators on the energy consumption of evaporation plant, as well as to validate performance of this type of evaporators. It was found that this type of evaporator decreased energy requirements and in the same time evaporation process was more effective due to high values of heat transfer coefficients. .

APA, Harvard, Vancouver, ISO, and other styles

4

Suhas, Upadhyaya, and Gumtapure Veershetty. "PARAMETRIC INVESTIGATION OF ORGANIC RANKINE CYCLE EVAPORATOR FOR LOW TEMPERATURE APPLICATIONS." Journal of Engineering Research [TJER] 16, no. 2 (December 23, 2019): 130. http://dx.doi.org/10.24200/tjer.vol16iss2pp130-141.

Full text

Abstract:

The present work deals with the development of thermodynamic model of low temperature basic Organic Rankine Cycle (ORC) system and a chevron plate heat exchanger evaporator sub-model using Engineering Equation Solver (EES). Work output is evaluated using the ORC thermodynamic model, while the evaporator sub-model calculates the total surface area of the heat exchanger. Using these mathematical models, the effect of evaporation pressure, expander inlet temperature and pinch point temperature difference (PPTD) on the network output and evaporator cost are studied. In addition to this, the effect of plate spacing and plate width of chevron plate heat exchanger on pressure drop and evaporator cost are analyzed in detail. Finally, thermodynamic and geometric optimization is carried out using genetic algorithm to identify the optimum parameters at which the network output is maximized and pressure drop in the evaporator is minimized. Sensitivity analysis showed that optimum evaporator pressure existed at which network output is maximum. Thermodynamic optimization showed that work output was maximum (5.03 kW) at evaporator pressure of 5.77 bar. No improvement in the work output was seen with increase in PPTD and expander inlet temperature. Increase in plate width and plate spacing led to increase in evaporator cost and decrease in pressure drop.

APA, Harvard, Vancouver, ISO, and other styles

5

Oliveira, R. N., R. V. M. Reis, R. N. N. Koury, and L. Machado. "TRANSIENT MODEL OF A STATIC EVAPORATOR FOR AN AIR-WATER HEAT PUMP." Revista de Engenharia Térmica 10, no. 1-2 (December 31, 2011): 07. http://dx.doi.org/10.5380/reterm.v10i1-2.61944.

Full text

Abstract:

The increasing demand of electric energy in Brazil, allied to the great consumption in rush hour, has stimulated the study of water heating systems that substitute the electric shower. One of these equipments, the solar collector, is the most viable, with the best cost-benefits relation, because Brazil is a tropical country. A heat pump can be used as a support to solar collectors in places where the climatic conditions and/or the lack of available area of solar collection limit the use of the system. One way to improve this heat pump would be the substitution of its conventional evaporator for a static evaporator. This evaporator is constituted of a metallic plate with conformed canals, inside of which the coil is fixed through which the refrigerator cooling of the heat pump flows. The objective of this paper is the development of a mathematical model in transient regimen to simulate the static evaporator operation of an air-water heat pump. Some simulations had been carried through, that had allowed testing geometric parameters of the system, materials for the pipes and plates and different weather conditions. These computational tests had indicated that the model represents a good tool to project static evaporators.

APA, Harvard, Vancouver, ISO, and other styles

6

Engelhorn, H. R., and A. M. Reinhart. "Investigations on heat transfer in a plate evaporator." Chemical Engineering and Processing: Process Intensification 28, no. 2 (October 1990): 143–46. http://dx.doi.org/10.1016/0255-2701(90)80011-s.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Adoh, Lucky Ugochukwu, and Ola Victor Damilare. "THE PERFORMANCE EVALUATION OF A PLATE TYPE EVAPORATOR AND A SHELL AND TUBE EVAPORATOR." International Journal of Technical Research & Science 04, no. 09 (September 15, 2019): 1–8. http://dx.doi.org/10.30780/ijtrs.v04.i09.001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Merzah, Basil Noori, Majid H. Majeed, and Fouad A. Saleh. "Numerical study of flat plate solar collector performance with square shape wicked evaporator." Al-Qadisiyah Journal for Engineering Sciences 12, no. 2 (June 30, 2019): 90–97. http://dx.doi.org/10.30772/qjes.v12i2.592.

Full text

Abstract:

In this work, a system of a heat pipe is implemented to improve the performance of flat plate solar collector. The model is represented by square shape portion of the evaporator section of wicked heat pipe with a constant total length of 510 mm, and the evaporator section inclined by an angle of 30o. In this models the evaporator, adiabatic and condenser lengths are 140mm, 140mm, and 230mm respectively. The omitted energies from sunlight simulator are 200, 400, 600, 800 and 1000 W/m2 which is close to the normal solar energy in Iraq. The working fluid for all models is water with fill charge ratio of 240%. The efficiency of the solar collector is investigated with three values of condenser inlet water temperatures, namely (12, 16 and 20o C). The numerical result showed an optimum volume flow rate of cooling water in condenser at which the efficiency of collector is a maximum. This optimum agree well with the ASHRAE standard volume of flow rate for conventional tasting for flat plate solar collector. When the radiation incident increases the thermal resistance of wicked heat pipe is decreases, where the heat transfer from the evaporator to condenser increases. The numerical results showed the performance of solar collector with square shape evaporator greater than other types of evaporator as a ratio 15 %.

APA, Harvard, Vancouver, ISO, and other styles

9

Pacheco, C. R. F., and L. S. M. Frioni. "Experimental results for evaporation of sucrose solution using a climbing/falling film plate evaporator." Journal of Food Engineering 64, no. 4 (October 2004): 471–80. http://dx.doi.org/10.1016/j.jfoodeng.2003.11.014.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Ohara, Junichi. "Evaporation Heat Transfer of HFO-1233zd (E) in Falling Film Type Plate-fin Evaporator." Marine Engineering 56, no. 3 (May 1, 2021): 373–78. http://dx.doi.org/10.5988/jime.56.373.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Chien, L. H., and Y. C. Shih. "An Experimental Study of Mesh Type Flat Heat Pipes." Journal of Mechanics 27, no. 2 (June 2011): 167–76. http://dx.doi.org/10.1017/jmech.2011.18.

Full text

Abstract:

ABSTRACTFlat heat pipes having mesh capillaries were investigated experimentally in this study. An apparatus was designed to test thermal performance of plate type copper water heat pipe having one or two layers of #50 or #80 mesh capillary structures with 5 to 50 W heat input. The working fluid, water, is charged in volumes equivalent to 25%, 33%, or 50% of the internal space. In addition to horizontal orientation, heat pipes were tested with the evaporator section elevated up to 40 degree inclination angle. Temperature distribution of the heat pipe was measured, and the evaporator, adiabatic and condensation resistances were calculated separately. The effects of mesh size, charge volume fraction, and inclination angle on thermal resistance were discussed. In general, the #80 mesh yielded lower thermal resistance than the #50 mesh. Inclination angle has a more significant effect on condenser than evaporator. Analysis of evaporation and condensation in flat heat pipes was conducted and semi-empirical correlations were derived. The present evaporation correlation predicts evaporation resistance between −20% and +30%, and the condensation correlation predicts most condensation resistance data within ±30% for 25% and 33% charge volume fraction.

APA, Harvard, Vancouver, ISO, and other styles

12

Uehara, H., E. Stuhltra¨ger, A. Miyara, H. Murakami, and K. Miyazaki. "Heat Transfer and Flow Resistance of a Shell and Plate-Type Evaporator." Journal of Solar Energy Engineering 119, no. 2 (May 1, 1997): 160–64. http://dx.doi.org/10.1115/1.2887897.

Full text

Abstract:

The performance test of a shell-and-plate-type evaporator designed for OTEC plants, geothermal power plants, and heat pump systems is reported. This evaporator contains 30 plates with a unit area of 0.813 m2, coated with aluminum powder on the working fluid side. Freon 22 is used as working fluid. Results show an overall heat transfer coefficient of about 5000 W/(m2K) when the heating water velocity is 1 m/s. The mean boiling heat transfer coefficient is compared with a previous correlation proposed by Nakaoka and Uehara (1988). The water-side pressure loss is also reported.

APA, Harvard, Vancouver, ISO, and other styles

13

Gao, Zhang Yu, Hui Chen, Yan Jie Zhang, Shi Nan Li, Hong Mei Yu, Wei Xu, and Lu Ning Yu. "Optimization Design of Evaporator Tube Plate Mold Based on PDX." Advanced Materials Research 941-944 (June 2014): 1752–56. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.1752.

Full text

Abstract:

Current tube plate stamping die usually have some common problems, which include low standardization, low standard penetration and long mold design cycle. By analyzing stamping die used in the refrigeration industry, the cold-drawing dies blanking needs to be designed and optimized. Compared with the previous design methods, the method, that the Pro/E plug-PDX was used to design cold-drawing dies blanking with refrigeration equipment, has a lot of advantages. First, cycle was shortened to one-third of the original; second, the compound pressing method is able to reduce the pressing step and increase stripping device, in order to improve the reasonable structure and production efficiency. The new method proposed in this paper is able to increase design efficiency, shorten design cycles, reduce workload and improve the accuracy of the mold design, and reduce the cost of mold design.

APA, Harvard, Vancouver, ISO, and other styles

14

Wellsandt, S., and L. Vamling. "Heat transfer and pressure drop in a plate-type evaporator." International Journal of Refrigeration 26, no. 2 (March 2003): 180–88. http://dx.doi.org/10.1016/s0140-7007(02)00080-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Uehara, Haruo, Akio Miyara, Yasuyuki Ikegami, and Tsutomu Nakaoka. "Performance Analysis of an OTEC Plant and a Desalination Plant Using an Integrated Hybrid Cycle." Journal of Solar Energy Engineering 118, no. 2 (May 1, 1996): 115–22. http://dx.doi.org/10.1115/1.2847976.

Full text

Abstract:

A performance analysis of an OTEC plant using an integrated hybrid cycle (I–H OTEC Cycle) has been conducted. The I–H OTEC cycle is a combination of a closed-cycle OTEC plant and a spray flash desalination plant. In an I–H OTEC cycle, warm sea water evaporates the liquid ammonia in the OTEC evaporator, then enters the flash chamber and evaporates itself. The evaporated steam enters the desalination condenser and is condensed by the cold sea water passed through the OTEC condenser. The optimization of the I–H OTEC cycle is analyzed by the method of steepest descent. The total heat transfer area of heat exchangers per net power is used as an objective function. Numerical results are reported for a 10 MW I–H OTEC cycle with plate-type heat exchangers and ammonia as working fluid. The results are compared with those of a joint hybrid OTEC cycle (J–H OTEC Cycle).

APA, Harvard, Vancouver, ISO, and other styles

16

Enayatollahi, Hamid, Paul Sapin, Chinedu K. Unamba, Peter Fussey, Christos N. Markides, and Bao Kha Nguyen. "A Control-Oriented ANFIS Model of Evaporator in a 1-kWe Organic Rankine Cycle Prototype." Electronics 10, no. 13 (June 24, 2021): 1535. http://dx.doi.org/10.3390/electronics10131535.

Full text

Abstract:

This paper presents a control-oriented neuro-fuzzy model of brazed-plate evaporators for use in organic Rankine cycle (ORC) engines for waste heat recovery from exhaust-gas streams of diesel engines, amongst other applications. Careful modelling of the evaporator is both crucial to assess the dynamic performance of the ORC system and challenging due to the high nonlinearity of its governing equations. The proposed adaptive neuro-fuzzy inference system (ANFIS) model consists of two separate neuro-fuzzy sub-models for predicting the evaporator output temperature and evaporating pressure. Experimental data are collected from a 1-kWe ORC prototype to train, and verify the accuracy of the ANFIS model, which benefits from the feed-forward output calculation and backpropagation capability of the neural network, while keeping the interpretability of fuzzy systems. The effect of training the models using gradient-descent least-square estimate (GD-LSE) and particle swarm optimisation (PSO) techniques is investigated, and the performance of both techniques are compared in terms of RMSEs and correlation coefficients. The simulation results indicate strong learning ability and high generalisation performance for both. Training the ANFIS models using the PSO algorithm improved the obtained test data RMSE values by 29% for the evaporator outlet temperature and by 18% for the evaporator outlet pressure. The accuracy and speed of the model illustrate its potential for real-time control purposes.

APA, Harvard, Vancouver, ISO, and other styles

17

Wong, Shwin-Chung, Jhan-Hong Liou, and Chia-Wei Chang. "Evaporation resistance measurement with visualization for sintered copper-powder evaporator in operating flat-plate heat pipes." International Journal of Heat and Mass Transfer 53, no. 19-20 (September 2010): 3792–98. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2010.04.031.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Molki, M., Dr Mike Ohadi, A. P. Rupani, and F. H. R. Franca. "Enhanced Flow Boiling of R-134a in a Minichannel Plate Evaporator." Journal of Enhanced Heat Transfer 10, no. 1 (2003): 1–8. http://dx.doi.org/10.1615/jenhheattransf.v10.i1.10.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Hribernik, Ales. "Non-destructive method for inward leakage detection of a plate evaporator." Measurement Science and Technology 18, no. 5 (April 3, 2007): 1576–81. http://dx.doi.org/10.1088/0957-0233/18/5/049.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

KOYAMA, Kohei, Hirotaka CHIYODA, Hirofumi ARIMA, Akio OKAMOTO, and Yasuyuki IKEGAMI. "2D3 Ammonia Flow Boiling in a Plate Evaporator with Micro-grooved." Proceedings of Conference of Kyushu Branch 2013 (2013): 115–16. http://dx.doi.org/10.1299/jsmekyushu.2013.115.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Hwangbo, Han, and W. S. McEver. "Liquid flow analysis in the evaporator grooves of the cold plate." Journal of Thermophysics and Heat Transfer 2, no. 2 (April 1988): 172–79. http://dx.doi.org/10.2514/3.82.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Garrity, Patrick T., James F. Klausner, and Renwei Mei. "A Flow Boiling Microchannel Evaporator Plate for Fuel Cell Thermal Management." Heat Transfer Engineering 28, no. 10 (October 2007): 877–84. http://dx.doi.org/10.1080/01457630701378333.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Nakaoka, Tsutomu, and Haruo Uehara. "Performance test of a shell-and-plate type evaporator for OTEC." Experimental Thermal and Fluid Science 1, no. 3 (July 1988): 283–91. http://dx.doi.org/10.1016/0894-1777(88)90008-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Starace, G., M. Fiorentino, B. Meleleo, and C. Risolo. "The hybrid method applied to the plate-finned tube evaporator geometry." International Journal of Refrigeration 88 (April 2018): 67–77. http://dx.doi.org/10.1016/j.ijrefrig.2017.12.007.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Mustain, Iing, Abdurohman, and Haris Rahmanto. "Studi Kinerja Fresh Water Generator Di Kapal AHTS PETEKA 5401." Jurnal Sains Teknologi Transportasi Maritim 1, no. 2 (November 12, 2019): 7–12. http://dx.doi.org/10.51578/j.sitektransmar.v1i2.3.

Full text

Abstract:

Fresh water is one of the primary needs on board. Shortage of fresh water on board, has a considerable risk, and to overcome the problem of lack of fresh water, commercial vessels are generally equipped with fresh water generators where the aircraft works with the process of evaporating seawater in the evaporator and seawater vapor is cooled with the way condensation in the distillation plane to produce fresh water. The fresh water genertaor parts are Evaporator, Condenser, Demister, Water ejector, Ejector Pump, and Destillate Pump. Then the Cause of Declining Freshwater Production in Fresh Water Generators is a decrease in fresh water production in fresh water generators. As for how to overcome so that the production of fresh water produced by fresh water generators does not decrease ie when the evaporator plate is cleaned, make sure the gasket on the plate must be in good condition, then cleaned from the crust attached to the plate, once every six months the nozzle and diffuser ( throwers) are removed and examined. And check the ejector pump for leaks and from corrosion such as impellers, casings, rings and shafts. In generating data the author uses descriptive research that is used to find the broadest possible knowledge of the object of research at a particular time. Descriptive research is research whose purpose is to explain or describe an event, condition, object whether a person, or everything related to variables that can be explained using either numbers or words. Keywords : Fresh Water Generator, Evaporator, Ejector Pump Air tawar merupakan salah satu kebutuhan primer di atas kapal. Kekurangan air tawar di atas kapal, mempunyai resiko yang cukup besar, dan untuk mengatasi masalah kekurangan air tawar, kapal-kapal niaga pada umumnya dilengkapi dengan fresh water generator dimana pesawat ini bekerja dengan proses menguapkan air laut di dalam evaporator dan uap air laut didinginkan dengan cara kondensasi di dalam pesawat destilasi sehingga menghasilkan air tawar. Bagian-bagian fresh water genertaor adalah Evaporator, Kondensor, Demister, Air ejektor, Pompa ejektor, dan Pompa destillate. Kemudian Penyebab Menurunnya Produksi Air Tawar Pada Fresh Water Generator adalah menurunnya produksi air tawar pada fresh water generator. Adapun cara mengatasi agar produksi air tawar yang di hasilakan fresh water generator tidak menurun yaitu pada saat plat evaporator dibersihkan, pastikan gasket pada plat harus dalam kondisi baik, kemudian dibersihkan dari kerak-kerak yang menempel pada plat, setiap enam bulan sekali nozzle dan difuser (penyembur) dilepas dan diperiksa. Dan periksa pompa ejektor dari kebocoran dan dari korosi seperti impeller, casing, ring, dan shaft. Dalam menghasilkan data penulis menggunakan penelitian deskriptif yang digunakan untuk menemukan pengetahuan yang seluas-luasnya terhadap objek penelitian pada suatu masa tertentu. Penelitian deskriptif adalah penelitian yang tujuannya untuk menjelaskan atau mendeskripsikan suatu peristiwa, keadaan, objek apakah orang, atau segala sesuatu yang terkait dengan variabel-variebel yang bisa dijelaskan baik menggunakan angka-angka maupun kata-kata. Kata Kunci : Fresh Water Generator, Evaporator, Pompa Ejektor

APA, Harvard, Vancouver, ISO, and other styles

26

Ito, Sadasuke, Nakatsu Miura, Jin Qi Wang, and Miwako Nishikawa. "Heat Pump Using a Solar Collector With Photovoltaic Modules on the Surface." Journal of Solar Energy Engineering 119, no. 2 (May 1, 1997): 147–51. http://dx.doi.org/10.1115/1.2887894.

Full text

Abstract:

It is known that the higher the evaporation temperature, the higher the coefficient of performance of a heat pump for hot water supply. Flat-plate solar collectors which were insulated on the back and bonded with flexible polycrystalline silicon-type photovoltaic modules on the upper surfaces were used in a heat pump system as the evaporator in order to increase the coefficient of performance and to generate electric power. The total area of the collectors was 3.24 m2 and the photovoltaic modules covered 76 percent of the area. The characteristics of the photovoltaic array and the thermal performance of the heat pump were studied experimentally. The results indicated that a coefficient of performance (COP) of the heat pump as high as six could be obtained at 40°C of the water temperature at the inlet of the condenser in the daytime in winter. The peak electric power generated was 120 W. It was found that the photovoltaic modules on the collectors did not influence the performance of the heat pump appreciably. When there was little solar radiation, the COP of the heat pump became two which was very low. This defect was improved by using an evaporator, which had a high convective heat transfer coefficient, arranged in parallel with the fiat-plate collectors.

APA, Harvard, Vancouver, ISO, and other styles

27

Borovička, Martin, and Tomáš Hyhlík. "Mathematical model of compact type evaporator." EPJ Web of Conferences 180 (2018): 02012. http://dx.doi.org/10.1051/epjconf/201818002012.

Full text

Abstract:

In this paper, development of the mathematical model for evaporator used in heat pump circuits is covered, with focus on air dehumidification application. Main target of this ad-hoc numerical model is to simulate heat and mass transfer in evaporator for prescribed inlet conditions and different geometrical parameters. Simplified 2D mathematical model is developed in MATLAB SW. Solvers for multiple heat and mass transfer problems - plate surface temperature, condensate film temperature, local heat and mass transfer coefficients, refrigerant temperature distribution, humid air enthalpy change are included as subprocedures of this model. An automatic procedure of data transfer is developed in order to use results of MATLAB model in more complex simulation within commercial CFD code. In the end, Proper Orthogonal Decomposition (POD) method is introduced and implemented into MATLAB model.

APA, Harvard, Vancouver, ISO, and other styles

28

Arima, H., J. H. Kim, A. Okamoto, and Y. Ikegami. "Local boiling heat transfer characteristics of ammonia in a vertical plate evaporator." International Journal of Refrigeration 33, no. 2 (March 2010): 359–70. http://dx.doi.org/10.1016/j.ijrefrig.2009.09.017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Kawabata, Yusuke, Akio Okamoto, Yoshio Itsumi, Hirofumi Arima, and Yasuyuki Ikegami. "B214 Evaluation on plate evaporator with micro fabrication surface using various Freon." Proceedings of the Thermal Engineering Conference 2013 (2013): 319–20. http://dx.doi.org/10.1299/jsmeted.2013.319.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

TSUJMORI, Atsushi, Wataru ENOMOTO, and Kazuyuki OBARA. "406 Heat transport characteristics of loop heat pipe with plate-type evaporator." Proceedings of Conference of Hokkaido Branch 2008.47 (2008): 95–96. http://dx.doi.org/10.1299/jsmehokkaido.2008.47.95.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Clausen, N. E. "Development of a plate evaporator/condenser for the mechanical vapour compression process." Desalination 81, no. 1-3 (July 1991): 399–406. http://dx.doi.org/10.1016/0011-9164(91)85072-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Yang, Yang, Zhu Kai, Wang Yabo, Wei Jie, and Sarula Chen. "Experimental analysis of a Vapour-Liquid Separated Flat Loop Heat Pipe Evaporator System." MATEC Web of Conferences 307 (2020): 01055. http://dx.doi.org/10.1051/matecconf/202030701055.

Full text

Abstract:

In this paper, a unique operation mechanism of loop heat pipe (LHP) was proposed. To test the performance of LHP under this new mechanism, a visual flat LHP evaporator prototype and an open experimental system were designed and assembled, and start-up experiment and variable heat load experiment were done respectively to obtain the actual operation characteristics, such as the evaporator thermal resistance (Re), total thermal resistance (Rt), start-up time and temperature of base plate. The proposed LHP had better overall performance during the start-up tests when He value of EC was set to 0.5mm, and its corresponding Re and Rt value were 0.035 K/W and 0.451 K/W when the heating power was 208w. Meanwhile, as per the heat load applied to the base plate, the whole variable heat load experiment could be divided into three distinct stages: low heat load stage, efficiency operation stage and dry-out stage. Moreover, the results also showed that the circulation driven head formed inside of the EC played an important role in promoting the operation performance, especially when the wick, the vapour-liquid interface and the bottom of the evaporator arrived at a reasonable situation.

APA, Harvard, Vancouver, ISO, and other styles

33

Okereke, Chukwuemeka J., Idehai O. Ohijeagbon, and Olumuyiwa A. Lasode. "Energy and Exergy Analysis of Vapor Compression Refrigeration System with Flooded Evaporator." International Journal of Air-Conditioning and Refrigeration 27, no. 04 (December 2019): 1950041. http://dx.doi.org/10.1142/s201013251950041x.

Full text

Abstract:

In this study, energy and exergy analysis was used to evaluate the performance of a vapor compression refrigeration system with a flooded evaporator and the causes of high temperatures of beverage during the production process determined. Subsequently, the components of the operation that require modification were identified in order to improve the system performance. The actual operating parameters related to energy and exergy analysis of the investigated beverage manufacturing plant were measured, the thermal properties of the beverage were determined from a calorimeter experiment, and mathematical models were developed based on the first and second laws of thermodynamics from the literature. The system energy and exergy efficiencies were 57.46% and 21.17%, respectively, whereas the system exergy destruction was 695.71[Formula: see text]kW. The highest exergy destruction among the components of the refrigeration system occurred at the cooling plate, followed by the ammonia compressor. The cooling plate also experienced a loss in the refrigerating effect of 43.59[Formula: see text]kW. Therefore, the cooling plate is the area with the highest potential for improvement. The ammonia compressor presents another potential area of improvement, which includes operating the compressor at a high compression ratio and high superheated temperature. However, the reduction of beverage inlet mass flow rate at the cooling plate offers the best opportunity to achieve a low beverage temperature between 1.00∘C and 2.00∘C and decreasing the system exergy destruction without incurring additional investment costs.

APA, Harvard, Vancouver, ISO, and other styles

34

Zeng, Liping, Xing Liu, Quan Zhang, Jun Yi, Xiaohua Li, Xianglong Liu, and Huan Su. "Experimental and Simulation Study of Micro-Channel Backplane Heat Pipe Air Conditioning System in Data Center." Applied Sciences 10, no. 4 (February 13, 2020): 1255. http://dx.doi.org/10.3390/app10041255.

Full text

Abstract:

This paper mainly studies the heat transfer performance of backplane micro-channel heat pipes by establishing a steady-state numerical model. Compared with the experimental data, the heat transfer characteristics under different structure parameters and operating parameters were studied, and the change of heat transfer coefficient inside the system, the air outlet temperature of the back plate and the influence of different environmental factors on the heat transfer performance of the system were analyzed. The results show that the overall error between simulation results and experimental data is less than 10%. In the range of the optimal filling rate (FR = 64.40%–73.60%), the outlet temperature at the lowest point and the highest point of the evaporation section is 22.46 °C and 19.60 °C, the temperature difference does not exceed 3 °C, and the distribution gradient in vertical height is small and the air outlet temperature is uniform. The heat transfer coefficient between the evaporator and the condenser is larger than the heat transfer coefficient under the conditions of low and high liquid charge rate. It increases gradually along the flow direction, and decreases gradually with the flow rate of the condenser. When the width of the flat tube of the evaporator increases from 20 mm to 28 mm, the internal pressure drop of the evaporator decreases by 45.83% and the heat exchange increases by 18.34%. When the number of evaporator slices increases from 16 to 24, the heat transfer increases first and then decreases, with an overall decrease of 2.86% and an increase of 87.67% in the internal pressure drop of the evaporator. The inclination angle of the corrugation changes from 30° to 60°, and the heat transfer capacity and pressure drop increase. After the inclination angle is greater than 60°, the heat transfer capacity and resistance decrease. The results are of great significance to system optimization design and engineering practical application.

APA, Harvard, Vancouver, ISO, and other styles

35

Vaitkus, L., and V. Dagilis. "Refrigerant charge reduction in low-temperature transport refrigerator with the eutectic plate evaporator." International Journal of Refrigeration 47 (November 2014): 46–57. http://dx.doi.org/10.1016/j.ijrefrig.2014.07.011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Kafi, F., V. Renaudin, D. Alonso, J. M. Hornut, and M. Weber. "Experimental study of a three-effect plate evaporator: seawater tests in La Spezia." Desalination 182, no. 1-3 (November 2005): 175–86. http://dx.doi.org/10.1016/j.desal.2005.02.025.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Song, He, Liu Zhi-chun, Zhao Jing, Jiang Chi, Yang Jin-guo, and Liu Wei. "Experimental study of an ammonia loop heat pipe with a flat plate evaporator." International Journal of Heat and Mass Transfer 102 (November 2016): 1050–55. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2016.07.014.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Jeong, Hoyoung, Jinwoo Oh, and Hoseong Lee. "Experimental investigation of performance of plate heat exchanger as organic Rankine cycle evaporator." International Journal of Heat and Mass Transfer 159 (October 2020): 120158. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2020.120158.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Wong, Shwin-Chung, and Chung-Wei Chen. "Visualization and evaporator resistance measurement for a groove-wicked flat-plate heat pipe." International Journal of Heat and Mass Transfer 55, no. 9-10 (April 2012): 2229–34. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.01.045.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Kammuang-Lue, Niti, Deuansavanh Phommavongsa, Kritsada On-Ai, Phrut Sakulchangsatjatai, and Pradit Terdtoon. "Thermal Resistance of a Rotating Closed-Loop Pulsating Heat Pipe: Effect of Centrifugal Accelerations." Applied Mechanics and Materials 851 (August 2016): 292–98. http://dx.doi.org/10.4028/www.scientific.net/amm.851.292.

Full text

Abstract:

Objective of this study is to experimentally investigate the effect of centrifugal accelerations on thermal resistance of the rotating closed-loop pulsating heat pipe (RCLPHP). The RCLPHPs were made of a copper tube with internal diameter of 1.50 and 1.78 mm and bent into flower’s petal-shape and arranged into a circle with 11 turns. The evaporator section located at the outer end of the bundle while the condenser section placed around the center of the RCLPHP with no adiabatic section. Both sections had an identical length of 50 mm. R123, and ethanol was filled as working fluid respectively. The RCLPHP was installed on the test rig and it was rotated by the DC motor at the centrifugal acceleration of 0.5, 1, 3, 5, 10, and 20 times of the gravitational acceleration considering at the connection between the evaporator and condenser section. Heat input was generated by electrical annular-plate heaters and varied from 30 to 50, 100, 150, and 200 W. Ceramic papers, wooden plate, and insulation sheet were consecutively attached on the outer side of the heaters in order to prevent the heat loss from the heater. It can be concluded that when the centrifugal acceleration increases, the thermal resistance continuously decreases since the condensate flows back to the evaporator section more rapidly.

APA, Harvard, Vancouver, ISO, and other styles

41

Wu, Shen Chun, Shih Syuan Yan, Chen Yu Chung, and Shen Jwu Su. "The Study of PTFE Wicks Application to Loop Heat Pipes with Flat Evaporator." Applied Mechanics and Materials 775 (July 2015): 54–58. http://dx.doi.org/10.4028/www.scientific.net/amm.775.54.

Full text

Abstract:

This study investigates the application of PTFE wicks to flat-plate loop heat pipes (FLHPs). PTFE’s low heat transfer coefficient effectively prevents heat-leakage, which is a problem with using metal wicks, lowering the operating temperature and pressure. This paper uses PTFE particles to form wicks, and the effect of PTFE on flat-plate LHP performance is investigated. Experimental results shows that the highest heat load reached was 100W, with lowest thermal resistance of 0.61°C/W, and heat flux of about 10W/cm2, For the wick properties, the wick had an effective pore radius of the wick was around 9.2μm, porosity of 47%, and permeability of 1.0 x 10-12m2. Compared to the highest heat flux reported in literature thus far for PTFE flat-plate LHPs, the heat flux in this study was enhanced by around 50%.

APA, Harvard, Vancouver, ISO, and other styles

42

Marti´nez-Fri´as, J., and S. M. Aceves. "Effects of Evaporator Frosting on the Performance of an Air-to-Air Heat Pump." Journal of Energy Resources Technology 121, no. 1 (March 1, 1999): 60–65. http://dx.doi.org/10.1115/1.2795061.

Full text

Abstract:

This paper shows the development and use of a transient model for evaluating frost formation on a parallel-plate heat pump evaporator. A frost formation model is derived by applying the equations of conservation of mass, momentum, and energy, as well as empirical correlations, to calculate the growth and densification of the frost layer. The frost formation model is validated by comparison with experimental results. The frost formation model is then incorporated into the evaporator subroutine of an existing heat pump model to calculate performance losses due to frosting as a function of weather conditions and time of operation since the last evaporator defrost. Performance loss calculation includes the effect of air pressure drop through the evaporator and the reduction in evaporator temperature caused by the growth of the frost layer. The results show frost formation parameters and heat pump COP as a function of time and ambient conditions. It is determined that there is a range of ambient temperatures and humidities in which frosting effects are most severe, and this range is explored to calculate heat pump operating conditions. The heat pump analysis results are expected to be useful in predicting optimum defrosting conditions, and to evaluate alternative methods for defrosting.

APA, Harvard, Vancouver, ISO, and other styles

43

Bhattad, Atul, Jahar Sarkar, and Pradyumna Ghosh. "Energy-Economic Analysis of Plate Evaporator using Brine-based Hybrid Nanofluids as Secondary Refrigerant." International Journal of Air-Conditioning and Refrigeration 26, no. 01 (March 2018): 1850003. http://dx.doi.org/10.1142/s2010132518500037.

Full text

Abstract:

Energy and economic analyses of corrugated plate evaporator have been performed in this study by using brine-based hybrid nanofluids as secondary refrigerant for low temperature applications (milk chilling, ice making and fish freezing). Various hybrid nanofluids containing alumina with different nanoparticles (copper, silver and multi walled carbon nanotube) dispersed in ethylene glycol/water, propylene glycol/water, calcium chloride/water and potassium acetate/water brines have been considered. A comparison has been made based on overall heat transfer coefficient, evaporator size (heat transfer area), pump work, COP, annual cost and payback period. The maximum reduction in heat transfer area has been observed for PG brine-based alumina–silver hybrid nanofluid. Whereas, the maximum reduction in pump work and augmentation in COP have been obtained for PG brine-based alumina–MWCNT hybrid nanofluid. EG brine-based Alumina–Cu hybrid nanofluid yields minimum annual cost. Most of the nanofluids (except PG brine-based Al2O3–Ag nanofluid) seem to be not beneficial for practical use due to comparatively long payback period; however, that can be significantly reduced in future by decreasing nanoparticle cost and increasing nanofluid stability. The present study reveals that the brine-based hybrid nanofluids may be the potential option as next generation secondary refrigerants for low temperature applications.

APA, Harvard, Vancouver, ISO, and other styles

44

Liu, Ming Jun, Zhen Yu Zhao, and Bai Liu. "Process Optimization for the Side-Plate of the Core Part in Parallel Flow Evaporator." Applied Mechanics and Materials 55-57 (May 2011): 961–65. http://dx.doi.org/10.4028/www.scientific.net/amm.55-57.961.

Full text

Abstract:

The forming scheme of a side-plate of the core part in parallel flow evaporator was studied. Two forming schemes were compared and the explicit dynamic software DYNAFORM was applied to make simulations about the forming processes. According to comparisons between two forming schemes, the optimized scheme and process parameters were determined. Multi-station dies were designed based on the optimized process. Successful experiments with the dies showed that numerical simulation provided an efficient way for the optimization of the forming scheme in the side-plate production.

APA, Harvard, Vancouver, ISO, and other styles

45

Amin, Zakaria Mohd, M. N. A. Hawlader, and YE Shaochun. "ANALYSIS AND MODELING OF SOLAR EVAPORATOR-COLLECTOR." IIUM Engineering Journal 16, no. 2 (November 30, 2015): 13–29. http://dx.doi.org/10.31436/iiumej.v16i2.601.

Full text

Abstract:

Solar energy is considered a sustainable resource that poses little to no harmful effects on the environment. The performance of a solar system depends to a great extent on the collector used for the conversion of solar radiant energy to thermal energy. A solar evaporator-collector (SEC) is basically an unglazed flat plate collector where refrigerants, such as R134a is used as the working fluid. As the operating temperature of the SEC is very low, it utilizes both solar irradiation and ambient energy leading to a much higher efficiency than the conventional collectors. This capability of SECs to utilize ambient energy also enables the system to operate at night. This type of collector can be locally made and is relatively much cheaper than the conventional collector.Â Â At the National University of Singapore, the evaporator-collector was integrated to a heat pump and the performance was investigated for several thermal applications: (i) water heating, (ii) drying and (iii) desalination. A 2-dimensional transient mathematical model of this system was developed and validated by experimental data. The present study provides a comprehensive study of performance.Â KEYWORDS: heat pump; evaporator-collector.

APA, Harvard, Vancouver, ISO, and other styles

46

Xu, Shu, and Xiang ling. "Simulation of Evaporator for Two-phase Flow in the New Plate-fin Desalination Unit." Research Journal of Applied Sciences, Engineering and Technology 5, no. 13 (April 15, 2013): 3554–59. http://dx.doi.org/10.19026/rjaset.5.4487.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

KAWABATA, Yusuke, Akio OKAMOTO, Yoshio ITSUMI, Hirohumi ARIMA, and Yasuyuki IKEGAMI. "A235 Heat transfer enhancement for HFC Freon using micro fabrication surface on plate evaporator." Proceedings of the National Symposium on Power and Energy Systems 2013.18 (2013): 251–52. http://dx.doi.org/10.1299/jsmepes.2013.18.251.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

KEDZIERSKI, MARK A. "Effect of Inclination on the Performance of a Compact Brazed Plate Condenser and Evaporator." Heat Transfer Engineering 18, no. 3 (January 1997): 25–38. http://dx.doi.org/10.1080/01457639708939899.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Schmack, Mario, Goen Ho, and Martin Anda. "A bubble column evaporator with basic flat-plate condenser for brackish and seawater desalination." Environmental Technology 37, no. 1 (July 14, 2015): 74–85. http://dx.doi.org/10.1080/09593330.2015.1063706.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Hu, Haitao, Ruxu Zhang, Dawei Zhuang, Guoliang Ding, Wenjian Wei, and Liang Xiang. "Numerical model of two-phase refrigerant flow distribution in a plate evaporator with distributors." Applied Thermal Engineering 75 (January 2015): 167–76. http://dx.doi.org/10.1016/j.applthermaleng.2014.09.064.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Plate evaporator'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles